In a release from his office Monday, DeMint announced he will speak at what is being billed as an "emergency rally" coordinated by several groups, including the American Conservative Union and the Susan B. Anthony List.

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"The event has 'tea party' trimmings and plenty of muscle, including grass-roots support from six states," according to the GOP senator's Web site.

Also on the bill for Tuesday afternoon's rally in Upper Senate Park are Sen. Tom Coburn (R-Okla.), radio talk show host Laura Ingraham and Rick Scott, chairman of Conservatives for Patients Rights.

“We can expose them and confront them in the classic American spirit – a public gathering on their doorstep,” Ingraham told the Washington Times. “We will put every politician who supports this travesty on notice. Enjoy your remaining time in the U.S. Capitol because we’re coming for your seat.”